名古屋大学 · 物理学・天文学
Tajima教授の研究室は、高エネルギー天文学の分野に焦点を当て、特にフェルミ宇宙望遠鏡を用いたガンマ線パルサーおよび超新星残光の観測を通じて、宇宙線の加速機構や高エネルギー天体の物理的性質を解明することを目的としています。特に、ガンマ線によるパルサーの系統的探索や、超新星残光における粒子加速メカニズムの解明が主な研究テーマです。これらの研究は、宇宙線の起源解明や高エネルギー宇宙環境の理解に貢献しています。
Figures are computed from collected data and may differ slightly.
The dramatic increase in the number of known gamma-ray pulsars since the launch of the Fermi Gamma-ray Space Telescope (formerly GLAST) offers the first opportunity to study a population of these high-energy objects. This catalog summarizes 46 high-confidence pulsed detections using the first six months of data taken by the Large Area Telescope (LAT), Fermi's main instrument. Sixteen previously unknown pulsars were discovered by searching for pulsed signals at the positions of bright gamma-ray s
The discovery of bright gamma-ray emission coincident with supernova remnant (SNR) W51C is reported using the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope. W51C is a middle-aged remnant (10 4 yr) with intense radio synchrotron emission in its shell and known to be interacting with a molecular cloud. The gamma-ray emission is spatially extended, broadly consistent with the radio and X-ray extent of SNR W51C. The energy spectrum in the 0.2-50 GeV band exhibits steepening
Recent observations of supernova remnants (SNRs) hint that they accelerate cosmic rays to energies close to ~10(15) electron volts. However, the nature of the particles that produce the emission remains ambiguous. We report observations of SNR W44 with the Fermi Large Area Telescope at energies between 2 x 10(8) electron volts and 3 x10(11) electron volts. The detection of a source with a morphology corresponding to the SNR shell implies that the emission is produced by particles accelerated the
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